We just got what looks like to be a good deal from autoanything.com, about $252 for the K&N whole Cold air intake and cone air filter System, which went in quite smoothly, and we found that we can get over 40 Miles per gallon in Econ mode on the 1.5 liter turbocharged 2017 two door coupe.
When not in Econ mode, the drive ability and acceleration same someone smoother and more peppy, and the sound is just a tad more throaty.
Your mileage may vary; but we would highly recommend it! I have done three or four of these on our other vehicles, and this one by far was the easiest- the best one was on the V6 Camaro which acceleration was quite significant!
Good luck and I hope this helps!